WO2014009116A1 - Procédé de communication entre une unité maîtresse et une unité asservie - Google Patents

Procédé de communication entre une unité maîtresse et une unité asservie Download PDF

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Publication number
WO2014009116A1
WO2014009116A1 PCT/EP2013/062690 EP2013062690W WO2014009116A1 WO 2014009116 A1 WO2014009116 A1 WO 2014009116A1 EP 2013062690 W EP2013062690 W EP 2013062690W WO 2014009116 A1 WO2014009116 A1 WO 2014009116A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage level
line
control
signal
slave unit
Prior art date
Application number
PCT/EP2013/062690
Other languages
German (de)
English (en)
Inventor
Stephan Bolz
Original Assignee
Continental Automotive Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental Automotive Gmbh filed Critical Continental Automotive Gmbh
Publication of WO2014009116A1 publication Critical patent/WO2014009116A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40006—Architecture of a communication node
    • H04L12/40039—Details regarding the setting of the power status of a node according to activity on the bus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L2012/40208—Bus networks characterized by the use of a particular bus standard
    • H04L2012/40215—Controller Area Network CAN
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/08—Modifications for reducing interference; Modifications for reducing effects due to line faults ; Receiver end arrangements for detecting or overcoming line faults

Definitions

  • Electronic control units in motor vehicles usually communicate with each other by transmitting digital data via suitable data lines.
  • An example of this is the CAN bus, with the aid of which several control units can communicate with one another via a common data bus.
  • a relatively complex protocol is defined for the data transfer in order to ensure that a data record is transferred from a sender to a specific recipient.
  • two or more bus users may not transmit on the data bus at the same time.
  • the data transfer must be carried out safely and reliably even under the harsh operating conditions in the motor vehicle. All of these requirements have meant that the operation of such a data interface between a communication subscriber and the data line or the data bus can usually only take place with the aid of a microcontroller.
  • FIG. 1 An example of such a connection via a CAN bus is shown in FIG. 1.
  • An engine control unit ECU is connected via a CAN bus - CAN-Hi, CAN-Lo - to a heating control unit HC for the heaters HI-H4 of fuel injection valves.
  • the heater control unit HC in turn is connected via corresponding control lines 4.1 - 4.4 with the heaters Hl - H4 of the Kraftstoffeinsprit zventile to supply them with energy from the motor vehicle battery can.
  • the engine control unit ECU is also connected via corresponding lines to the fuel injection valves in order to be able to control the injection processes.
  • a microcontroller and a CAN transceiver is required in the heating control unit HC in order to be able to ensure the high demands on data security.
  • this is very complicated and expensive with such a simple control function as the illustrated switching on and off of a heating function.
  • the engine control unit ECU can Be ⁇ missing on and off the heaters Hl - H4 send to the heater control device HC, which in turn encodes the commands de ⁇ and actuates the corresponding switch.
  • the heater control device HC sends data back such as Diagnosein ⁇ formations, device status and possibly also heating temperature to the engine control unit ECU.
  • the engine control unit ECU acts as a master, while the Schuungssteu ⁇ er réelle HC has a slave function.
  • the object of the present invention is to provide a excellentgünsti ⁇ Gere solution for the transmission of data between a master unit and a slave unit.
  • the object is achieved by a method for communication via at least three lines between a master and a slave unit, which is connected at least with an actuator to its control via a control line.
  • the master transmits to the slave unit a release signal in the form of a predetermined voltage level via a first line to activate it. Via a second line, the master transmits to the slave unit for activating or deactivating the at least one actuator a control signal in the form of a predetermined, the Ein standing. Turning off associated voltage levels, wherein an actuator is only turned on when both the voltage level of the enable signal associated with the switch-on and the control signal is present.
  • a diagnostic signal from the slave to the master unit is transmitted via a third line, the voltage level of which is correct Function of the slave unit in the activated state of the slave unit is complementary to the voltage level of the control signal and in the deactivated state of the slave unit is complementary to the voltage level of the enable signal.
  • Complementary means here that if, for example, one signal has a high state, the other signal has the complementary low state and vice versa. Due to the inventive communication between the master and the slave unit by the combination of simple voltage levels on at least three lines is for interpreting these levels no microprocessor and to send and receive no special transceiver required, so this represents a cost-effective solution. In addition, it is ensured by the Erfor ⁇ obstacle of the presence of two specific levels on the ers ⁇ th and the second line that in a short circuit of one of the lines against the battery voltage, the function can not be turned on undesirable. Nevertheless, by a simple signal design on the third line, a diagnostic function can be realized.
  • the voltage level of the diagnostic signal assumes a high state to detect a line interruption of the or at least one of the control lines or a malfunction of the at least one actuator.
  • the error case of line break or malfunction of at least one actuator can be distinguished from each other.
  • the voltage level of the diagnostic signal is low in the case of a high state of the enable signal. Accept state and vice versa and in the deactivated state of the slave unit this error state can be reset.
  • the voltage level at the input of the master unit connected to the third line assumes a high state and in the case of a short circuit of the third line a low state.
  • FIG. 2 shows an apparatus for carrying out the method with only three communication lines between a master and a slave unit
  • FIG. 3 shows an example of an embodiment of a slave unit
  • FIG. 4 shows the time profile of the voltage levels on the three communication lines of the device according to FIG. 2.
  • FIG. 2 shows a data connection between an engine control unit ECU acting as a master unit and a heating control unit HC functioning as a slave unit by means of three Signal lines shown.
  • actuators are realized in the illustrated embodiment as Kraftscherinsprit zventile with heaters Hl - H4, which are connected to operate the Einsprit zfunktion via corresponding lines with the ECU ECU.
  • the Kraftscherinsprit zventile also have a heating function, to their operation they are connected to the heater control unit HC via control lines 4.1 - 4.4.
  • Both the control unit ECU and the heating control unit HC are connected via a respective two lines - battery, ground - to a vehicle battery (not shown).
  • the heater control unit HC has the function, on request by the engine control unit ECU, the heaters Hl - H4 of the Kraftstoffeinsprit zventile on or off.
  • FIG. 3 shows a heating control unit HC in somewhat greater detail.
  • the heating control unit HC is - as has already been stated - supplied via two lines Battery, Ground - Ener ⁇ gie from, for example, a motor vehicle battery.
  • a battery reverse connection BVS is provided, via which the energy from the battery driver circuits Driver 1 - Driver 4 is supplied, which, when appropriately controlled by a circuit logic SL, the battery voltage to the control lines 4.1 through 4.4 for the actuators Hl - H4.
  • a voltage regulator 5VR in the heater control unit HC is included, which provides a usual supply voltage for logic circuits, for example, 5 volts.
  • the control logic SL is supplied with a release signal ENABLE via a first line and a control signal CONTROL via a second line and can in turn transmit a diagnostic signal DIAG to the connected, acting as a master unit Mo ⁇ gate control unit ECU via a third line.
  • the communication takes place in accordance with the invention via corresponding voltage levels on the three lines, which are shown in Figure 4.
  • the heating function of the fuel injection valves is switched on by a voltage level corresponding to a high state and is switched off again by a voltage level corresponding to a low state. Activation of the heating function actually takes place only when both the voltage level of the control signal CONTROL corresponding to the switch-on, in the illustrated exemplary embodiment the high state, and the activation state of the enable signal ENABLE are present.
  • Missing one of the two signals, or is one of the lines be damaged ⁇ is not heated. This ensures that in the event of a line fault - such as a short to ground or against battery potential or a line break - the heater is not activated inadvertently.
  • the state of the heating control device HC which acts as a slave unit, is communicated to the engine control unit ECU, which functions as a master unit, and an error may be indicated by the voltage level on the third line or at the input of the engine control unit.
  • the HC Schuungs tenuge ⁇ advises requires no microcontroller and can be provided instead with a simple control logic SL. This sequence control can, for. B. from standard logic devices such as gates, memories, etc. be constructed.
  • the heater control device HC can be connected to the ECU Motortownge ⁇ advises certain states or errors of the lines from the Hei to the fuel injection valves Hl - H4 to the engine control unit ECU.
  • the engine control unit ECU can detect errors on the third line.
  • the first track "HEATER OK" shows the signal course on the third line when the heater is functioning without errors and all the control lines and the diagnostic line are also error-free
  • the diagnostic signal DIAG follows the time progression of the control signal CONTROL, as long as the voltage level of the enable signal .. eNABLE has a high state, the clamping ⁇ voltage level of the diagnostic signal DIAG are complementary to the voltage levels of the control signal cONTROL, the voltage level of the enable signal eNABLE However, changes to a low state, takes the voltage level of the diagnostic signal DIAG - regardless of the voltage level of the control signal cONTROL -. a high state of
  • the "HEATER OPEN" trace shows the behavior in the event of an interruption of one of the connection lines 4.1 - 4.4 of the heating control unit HC to the heaters Hl - H4 of the fuel injection valves or the interruption of a heating element in a heater Hl - H4 the voltage level of the diagnostic signal DIAG is Zung control unit of the Hei-HC was added to a high state. persists the error, the voltage level of Diagnosesig ⁇ Nals DIAG remains in other heating phases (HEATER ACTIVE) in a high state.
  • the duration of the heating phase varies in function causes between several seconds during the heating phase, ei ⁇ nigen a hundred milliseconds in the control phase when the set temperature is reached, and in continuous operation with running Mo ⁇ tor when constantly cold fuel has to be heated.
  • the "HEATER SHORT, OVERCURRENT" trace shows the behavior in the event of a short circuit on the control lines 4.1 - 4.4 between the heating control unit HC and the heaters Hl - H4 of the

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne un procédé pour assurer la communication, par l'intermédiaire d'au moins trois lignes, entre une unité maîtresse et une unité asservie, cette dernière étant reliée par l'intermédiaire d'une ligne de commande (4.1, 4.2, 4.3, 4.4) à au moins un actionneur (H1, H2, H3, H4) afin d'assurer la commande de celui-ci. L'unité maîtresse (M) transmet par l'intermédiaire d'une première ligne (1) un signal de validation (ENABLE), sous la forme d'un niveau de tension prédéterminé, à l'unité asservie (S) afin de permettre l'activation de cette dernière. Pour activer ou désactiver ledit au moins un actionneur(H1, H2, H3, H4), l'unité maîtresse (M) transmet à l'unité asservie (S), par l'intermédiaire d'une deuxième ligne (2), un signal de commande (CONTROL), sous la forme d'un niveau de tension associé à la connexion et/ou à la déconnexion. Un actionneur n'est activé qu'en présence à la fois du niveau de tension du signal de validation (ENABLE), qui est associé à la connexion, et au signal de commande (CONTROL) . L'unité asservie (S) transmet à l'unité maîtresse (M), par l'intermédiaire d'une troisième ligne (3), un signal de diagnostic (DIAG) dont le niveau de tension est complémentaire du niveau de tension du signal de commande (CONTROL), lorsque l'unité asservie (S) fonctionne correctement, à l'état activé, et est complémentaire du niveau de tension du signal de validation (ENABLE), lorsque l'unité asservie (S) est à l'état désactivé.
PCT/EP2013/062690 2012-07-10 2013-06-19 Procédé de communication entre une unité maîtresse et une unité asservie WO2014009116A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201210211987 DE102012211987B4 (de) 2012-07-10 2012-07-10 Verfahren zur Kommunikation zwischen einer Master- und einer Slave-Einheit
DE102012211987.6 2012-07-10

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WO2014009116A1 true WO2014009116A1 (fr) 2014-01-16

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107132833A (zh) * 2016-02-26 2017-09-05 欧姆龙株式会社 主机、从机装置及其控制方法、控制程序、错误监控系统
WO2019124806A1 (fr) * 2017-12-21 2019-06-27 주식회사 엘지화학 Appareil et procédé de diagnostic d'anomalie de communication

Citations (1)

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US20060106578A1 (en) * 2004-11-15 2006-05-18 Tsutomu Yamada Machine management device, communication line diagnosis device and machine management method

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US7327781B2 (en) * 2002-12-17 2008-02-05 Invensys Systems, Inc. Universal intelligent modem

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US20060106578A1 (en) * 2004-11-15 2006-05-18 Tsutomu Yamada Machine management device, communication line diagnosis device and machine management method

Non-Patent Citations (1)

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Title
HOYME K ET AL: "ARINC 629 AND SAFEBUS*: DATA BUSES FOR COMMERCIAL AIRCRAFT", SCIENTIFIC HONEYWELLER, HONEYWELL'S CORPORATE. MINNEAPOLIS, US, vol. 11, no. 1, 21 September 1991 (1991-09-21), pages 57 - 70, XP000289742, ISSN: 0196-8440 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107132833A (zh) * 2016-02-26 2017-09-05 欧姆龙株式会社 主机、从机装置及其控制方法、控制程序、错误监控系统
US10554522B2 (en) 2016-02-26 2020-02-04 Omron Corporation Master device, slave device, error monitoring system, and control method and control program of master device
CN107132833B (zh) * 2016-02-26 2020-09-29 欧姆龙株式会社 主机、从机装置及其控制方法、记录介质、错误监控系统
WO2019124806A1 (fr) * 2017-12-21 2019-06-27 주식회사 엘지화학 Appareil et procédé de diagnostic d'anomalie de communication
KR20190075489A (ko) * 2017-12-21 2019-07-01 주식회사 엘지화학 통신 진단 장치 및 방법
KR102150068B1 (ko) 2017-12-21 2020-08-31 주식회사 엘지화학 통신 진단 장치 및 방법
US11449381B2 (en) 2017-12-21 2022-09-20 Lg Energy Solution, Ltd. Apparatus and method for diagnosing communication fault

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DE102012211987B4 (de) 2014-02-13

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